Flood — Monona, Iowa

2019-03-13 to 2019-03-15 · near Mapleton Muni Arpt, Monona, Iowa

Event narrative

This is for flooding along the Maple River. The river gage at Mapleton, operated by the USGS, peaked at 23.60 feet at 6:15 pm on March 14th. Minor flood stage is 21 feet, moderate flood stage is 24 feet . Preliminarily this peak is the 2nd highest on record. Ice jamming may have played a role in the flooding at this location. The flooding caused damage and the closure of Hwy. 183 West of Mapleton. Hwy 175 south of Mapleton and the closure of Hwy. 175 North of Mapleton. Also the local Airport was totally flooded and damaged. Flood totals are for for the County including from damage caused by flooding of the Soldier River.

Wider weather episode

A 971mb bomb cyclone moved out of the central Rockies on Wednesday, March 13, 2019 and helped to create widespread, moderate to major, and in many cases historic, flooding across eastern Nebraska and western Iowa. From 4 to 15 inches of snow cover remained across the mid Missouri River valley, and the ground was frozen with existing frost depths of 15 to 23 inches. Warm temperatures allowed all of the snow to rapidly melt and record moisture allowed 1 to 2.5 inches of rain to fall over a 48 hour period. Due to the frozen ground, and that 1 to 2 feet of thick ice remained in area rivers, widespread, and in many cases, catastrophic flooding developed. Due to expansive levee breaches on many rivers and streams, the flood damage was particularly devastating to many communities. Four individuals lost their lives due to the extreme conditions, and several hundred people required rescue via air or boat. Tens of thousands of people were evacuated from their homes or businesses. Nearly 50 levees were breached on the Platte, Elkhorn and Missouri Rivers due to the large volume of water. One such levee breach along the Platte River near Leshara, Nebraska forced the evacuation of National Weather Service Omaha, located in Valley, Nebraska for 8 days. Nebraska Governor Pete Ricketts presented US$1.3 billion preliminary damage estimates for the entire state, including specific sector losses of: $439 million infrastructure (including roads and bridges), $85 million private homes and businesses, $400 million livestock and $440 million crop. About 2,000 miles of state roads including 15 Nebraska state highway bridges and numerous local bridges, roughly 20 percent of the entire state road system were impacted. Iowa Governor Kim Reynolds provided a $1.6 billion preliminary damage estimate due to flooding across the state. U.S. Interstate 29, extending north-south along the Missouri River, was inundated and partially destroyed, as was the Interstate 680 bypass around Council Bluffs-Omaha metropolitan area. Also noteworthy was damage to Offutt Air Force Base located near Bellevue, Nebraska. One-third of the base's main runway was inundated, along with one-third of Offutt's buildings, with several hundred employees, and several families displaced. Preliminary damage estimates released by the Department of Defense are on the order of $450 million. Nebraska and Iowa severe flooding impacts culminated in Federal Disaster Declaration 4420.

View location on OpenStreetMap → (42.3400, -95.6400)

Source: NOAA Storm Events Database, event_id 813994. Narrative written by the NWS forecast office that issued the report.